Slotting-machine.



. PATENTED JUNE 12, 1906; O. C. NEWTON.

SLOTTING MACHINE. APPLICATION FILED FEB. 11. 1901.

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. U. 0. NEWTON. SLOTTING MACHINE. APPLICATION FILED FEB. 11. 1901.

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UNITED STATES PATENT OFFICE.

CHARLES C. NEWTON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO NEWTONMACHINE TOOL WORKS, INCORPORATED, OF PHILADELPHIA, PENNSYLVANIA, ACORPORATION OF PENNSYLVANIA.

SLOTTlNG-MACHINE.

Specification of Letters Patent.

Patented June 12, 1906.

Application filed February 11,1901. Serial No. 46,863-

Improvements in slotting-Machines, of which the following is aspecification.

The object of my invention is to so construct a slotting-machine that itcan be readily moved from one portion of a shop to another and can beclamped in any position on a bed-plate upon which the work is secured.

A further object is to make the machine self-contained by mounting anelectric motor on the sliding portion of the machine, so that themachine can be shifted on its own supporting-bed or moved withoutinterfering with the belting.

In the accompanying drawings, Figure 1 is a front view of my improvedslotting-machine. Fig. 2 is a side view. Fig. 3 is a broken elevation ofthe screw-spindle and adjoining part in section. Fig. 4 is a sectionalplan view on the line A 4, Fig. 3.

A is the base-plate, having at the front and rear edges undercut flangesa a.

B is the standard of the machine. This standard carries all the movingelements and is arranged-to slide upon the base-plate A, having lips I),which underlap the flanges a a, the lips in the present instance beingin the form of detachable plates.

A feed-screw A is mounted in the baseplate and passes through a nut onthe standard B and is shaped at each end so that a lever can be appliedthereto to adjust the standard on the base-plate. The standard B is inthe form of a box-frame having vertical guide-faces bat the front, uponwhich slides the carriage D, and on the carriage is the toolslide E F isa vertically-arranged screw mounted in bearings b b on the standard andprovided with thrust-washers ff, consisting, in the present instance, ofa series of brass and steel plates alternately arranged, each set ofwashers being inclosed within a casing f containing a lubricant. Thescrew F passes through a nut d, secured to the carriage D,

Fig. 4, so that vertical movement is imparted to the carriage on turningthe screw.

At the upper end of the standard B is gearing by which the screw isoperated. Near the upper end of the screw is a collar f forming part ofthe screw-rod, and this collar rests on the upper thrust-bearing. Thescrew-rod extends above this collar, and mounted loosely on thisextension and resting upon the collar is a gear-wheel g, which mesheswith a pinion g on the stud G, projecting from the standard. In thepresent instance this pinion is mounted on the extended hub of a bevelgear-wheel 9 which is loosely mounted on the stud G, and this bevelgearwheel meshes with a bevel-pinion g on the driving-shaft G, supportedby a bracket projecting. from the standard. This drivingshaft has, inthe present instance, two fast pulleys and a loose pulley.

H is a belt-shifter which may be of any suitable form. In the presentinstance I have shown it consisting of two independent arms h h,controlled by a cam-slide h, arranged to slide in the bracket supportingthe shaft G and controlled by a vertical operating-rod H, connected atits upper end to the slide h through a bell-crank lever h and rod h Thelower end of the vertical operatingrod H is guided in a bearing b at thebase of the standard, so that any vertical movement imparted to theshifter-operating rod H will be imparted to the shifter, so that the twobelts extending from the motor-shaft can be shifted either onto the fastpulleys or the loose pulley to drive the screw in either direction. Onthe rod H are adjustable stops h b and on the slide D is an arm (1, Fig.4, which is arranged to strike the stops and shift the rod, so as toreverse the screw at the end of each stroke of the slide.

The tool-slide E is mounted on transverse undercut guides of thecarriage D, as clearly shown in Fig. 2, and the transverse movement ofthis tool-slide is controlled by a screw-shaft I, mounted in bearings onthe carriage D and engaging a nut on the toolslide. This screw-shaft hasa pinion i meshing with a gear-wheel i on a stud projecting from thecarriage, and this gear-wheel meshes with a second gear-wheel i on theshaft I of the carriage, from which is loosely supported the arm 6carrying any desired form of pawl, (not shown,) engaging with the teethof the gear and turning the same when said armis moved in one directionand permitting the screw ofthe slide, so that the slide is movedtransversely on the carriage.-

The'tool slide Ecarries at it's lower endi the tool-block K, to whichthetool is secured by the ordinary clamps This tool-block is arrangedtoslide onundercut ways onthe under side of' the tool-slide E and can be-movedin andout byxmeans of aniordinary feed-screw. (Not shown.)

Onthe upper end of-the hub ofthe gearwheel 9, carried on theupper end ofthe screwshaft F, is apositive clutch-face, withwhich:

engage the teeth of'the clutch-sleeve L. The upward movement of thisclutch-sleeve is limitedby a nut Z, screwed onto the end of' thefeed-screw F.

Alever L, pivoted at Z 'to an'upright B" on the standard'B, is connectedto a verti cally-arrangedoperating-rod L guided at .its lower end-ina-bearing-b at thebase of the standard, so that any vertical imovementimparted tothis rod willthrow the clutchinto andout of gear with thesleeve, so that the feed can i be instantly stopped or started by Thelever I) vertically moving the rod-L extends beyondthe clutch-sleeveand'is connected to a rod P, which works in'abearing Z on the standardB, acting as aguide for the- This depending rod Z extends in po-- lever.sition to be struck by the carriage'at' its extreme upward movement, andthe rodat the' opposite end of the arm, which is guided in.

the base of the machine, has a collar Zflwhich is arrangedto bestruc'kby the carriage atits extreme downward movement. This is a safetydevice to throw the clutch outof gear, and consequently stop thefeed ofthe screwshaft controlling" the-movement of the carriage whenthe-carriage is ineither of its extreme positions. This is especiallyadvantageous where a-belt orsome other part of the mechanism shouldbreak and the carriage would not be shifted'at' the proper time.

The carriage D is preferably counterbalanced by. a weight D sliding atthe back of the machine, (shown by dottedlines in Fig.

2,) and the upper end of this weight is connected to the upper end'ofthe carriage'by ropes or chains p p,- which pass around wheels p p onashaft P, mounted in bear ings on the standard.

I claim as my invention- 1. The combination in a slotting-machine, of astandard,- a driving-shaft carried thereby, a vertical feed-screw on thestandard, a horizontal shaft on the standard, the same having meanswhereby it is driven in either direction from said driving-shaft,gearing connection between said horizontal shaft and the feed-screw,means for changing the direction of rotation of said horizontal shaft, arod for actuating "said -rotation-changing means, adjustable bloc-ksonsaidlrod, a carriage on the standard movable bythescrew, aniarm on 1the carriage placed to be engaged I by. the

blocks on the-rod-and a clutc-hifor coupling the driving-shaft: to thescrew, with a-second rod for operating the clutch, said'latter rodhaving means placedtobe-actuated by'the carriage but beyond the normal'range of action-thereof, substantiallyas described.

2; The combinationofastandard, a feedscrew, means for'driving said'screw'from a source of power, means for changing the di-, rectlon ofrotatlon of'the screw, a carri'age reciprocable by the-screw uponthestandard {and controlling said directionchanging means, a tool-slideon the carriage, automatically-operatingfeed mechanism thereforincludinga railon the standard, adjustablymountedlblocks onsaidirail,an=arm on the carriage placed to engage said'vblocks, and-apawl-and-ratcht connection between said arm and the tool-slidefeedimechanism, one of said blocks being placed to engage said arm andthereby cause operation of said ,mechanism, and theothen being" placedto positively engage the arm to restore it to its normal position after'such operation, substantially as described.

3. The combination in 1 a slotting machine, of a standard, drlvmgmechanism, aoarriage 'onthe standard, altool oarriedibythe car- "rlage,mechanism forvoperatlngsaid carnage,

a'clutch forcoupling theoperating mechanism to the driving-mechanism, alever controlling-the-clutch, a rod on one-arm of the leverin-thepath-of the oarriage-onits upward stroke and-a secondrodalso connectedt'o-the leverwand having a projeetion-inthe path of the carriage on itsdownwardstroke, substantially as describedi In testimony whereof I havesigned my name to this specification inthe presence of two subscribingwitnesses.

CHARLES C. NEWTON.

